Hello Jame
I am working the Linux testbed based on "RSVP-TE for MPLS diffserv" =
project
I want compare MPLS forwarding and normal IP forwarding perfomace. The =
topology is
-----Ingress -----Core ----10M -----Egress---- (other part is 100M)
I measure the each router per node delay by using external anlyaer =
(tcpdump/tethereal). the result show
on Ingress, since MPLS stack over head, the delay of MPLS > IP
on Core, delay of MPLS almost =3D delay of IP ( I expected the MPLS =
should fast then IP, since label swictc)
on Egress, delay of MPLS a liitle big , almost same =3DIP..
I try figure out why on Core mpls forwarding not fast, I email Pim, he =
said under linux , MPLS forwarding is based on IP forwarding (since time =
cosuming and error prone if without IP forwarding)
This is why I want ask you question
1) why in your mpls implemntaio, based on IP forawrding, does it do IP =
table look up?
2) How much involved in IP forwarding when implement MPLS forwarding.?
3) if I emulete a lager IP routing table, can i get mpls fast than IP?
thanks
yuxiao
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